http://en.wikipedia.org/wiki/Functor

http://en.wikipedia.org/wiki/Morphism

http://en.wikipedia.org/wiki/Non-well-founded_set_theory

http://en.wikipedia.org/wiki/Alternative_set_theory

http://en.wikipedia.org/wiki/Equivariant_map

http://en.wikipedia.org/wiki/Symmetric_monoidal_category

http://en.wikipedia.org/wiki/Universe_(mathematics)

probably some links i wanted to place are currently missing..

Noticed, for example, the cosmos theory.. I think its interesting because indeed it feels – when doing stuff with sequences – that these are like stars and planets and galaxies etc..

(a sizeable inference – but hey, that’s why am interested in the cosmos and universe metaphors..)